linux-kernel - Re: [PATCH] rust: add basic ELF sections parser

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Message-ID: <2025053007-playtime-french-c2fa@gregkh>
Date: Fri, 30 May 2025 11:00:47 +0200
From: Greg KH <gregkh@...uxfoundation.org>
To: Alexandre Courbot <acourbot@...dia.com>
Cc: Danilo Krummrich <dakr@...nel.org>, Timur Tabi <timur@...nel.org>,
	John Hubbard <jhubbard@...dia.com>, Miguel Ojeda <ojeda@...nel.org>,
	Alex Gaynor <alex.gaynor@...il.com>,
	Boqun Feng <boqun.feng@...il.com>, Gary Guo <gary@...yguo.net>,
	Björn Roy Baron <bjorn3_gh@...tonmail.com>,
	Benno Lossin <benno.lossin@...ton.me>,
	Andreas Hindborg <a.hindborg@...nel.org>,
	Alice Ryhl <aliceryhl@...gle.com>, Trevor Gross <tmgross@...ch.edu>,
	linux-kernel@...r.kernel.org, rust-for-linux@...r.kernel.org
Subject: Re: [PATCH] rust: add basic ELF sections parser

On Fri, May 30, 2025 at 03:56:37PM +0900, Alexandre Courbot wrote:
> On Fri May 30, 2025 at 3:21 PM JST, Greg KH wrote:
> > On Fri, May 30, 2025 at 09:58:02AM +0900, Alexandre Courbot wrote:
> >> > But for now, doing it in generic code, that all systems end up loading,
> >> > yet very very very few would ever actually use makes no sense.  And
> >> > adding it to a driver also doesn't make sense as you can define your
> >> > user/kernel api now, it's not set in stone at all given that there is no
> >> > existing code merged.
> >> 
> >> Eschewing this from the driver would require duplicating the GSP
> >> firmware (a healthy 26MB compressed binary) in linux-firmware to provide
> >> both ELF and non-ELF versions of the same code, and also store the other
> >> ELF sections as their own files. I expect this to be a hard sell for
> >> linux-firmware.
> >
> > Why would the linux-firmware people care about the size of firmware
> > blobs being given to them?  That's the whole reason for their existance,
> > to put them in one place instead of having to download them from random
> > locations on the internet, or to have them in the kernel tree itself.
> >
> > It's already 300MB or so for the whole project, what's 26MB more?
> 
> Roughtly 1/10th of the current total size as avoidable overhead. ^_^;

It's just storage on a disk, that's not an issue.  Storage sizes just
increased by more than that in the days we've taken on this email
thread :)